[Tutor] help with telnet error

[Chris Hallman]

I'm working on a program that telnets to multiple devices to test their
backup ISDN BRI connections. I'm trying to build in error recovery with
try/except logic, but I'm having trouble getting it to work. This first
example uses a host name that isn't in our DNS (yes, this does happen):

import telnetlib
host = "s3793ap01"
telnetlib.Telnet(host)

Traceback (most recent call last):
 File "<pyshell#30>", line 1, in <module>
   telnetlib.Telnet(host)
 File "c:\python25\lib\telnetlib.py", line 208, in __init__
   self.open(host, port)
 File "c:\python25\lib\telnetlib.py", line 225, in open
   for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
gaierror: (11001, 'getaddrinfo failed')

try:

   telnetlib.Telnet(host)
except gaierror, e:
   print "error found", e




Traceback (most recent call last):
 File "<pyshell#16>", line 3, in <module>
   except gaierror, e:
NameError: name 'gaierror' is not defined

try:

   telnetlib.Telnet(host)
except IOError, e:
   print "error found", e




Traceback (most recent call last):
 File "<pyshell#22>", line 2, in <module>
   telnetlib.Telnet(host)
 File "c:\python25\lib\telnetlib.py", line 208, in __init__
   self.open(host, port)
 File "c:\python25\lib\telnetlib.py", line 225, in open
   for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
gaierror: (11001, 'getaddrinfo failed')


As you can see, I'm not sure how to handle the error. Any ideas?

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